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ratelena [41]
3 years ago
6

A person who has a weakened immune system may not be able to fight against infection because

Biology
2 answers:
ra1l [238]3 years ago
8 0

Answer:

a.

Explanation:

pathogens may enter the body and cause illness.

Sholpan [36]3 years ago
7 0

Answer:

A is the answer to you question ED2020

Explanation:

this would be your answer guys !!

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A forensic scientist is trying to find out the number of adenine in the DNA sample that he obtained from a crime scene.
Anuta_ua [19.1K]

The right answer is The number of adenine will be equal to the number of thymine.

Chargaff's rules indicate that the DNA of any cell or organism must have a ratio of 1 to 1 between purine bases and pyrimidine bases and, more specifically, that the amount of guanine is equal to the amount cytosine, and that the amount of adenine is equal to the amount of thymine. This trend is found in both strands of DNA.

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s2008m [1.1K]

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I’m just a little confused can someone explain ?
Airida [17]

Basically, there is a presentation of types of food and the amount of those foods over 50 years in this graph. This means the graph is showing amounts of certain foods over the time period. I'm guessing that basing off of the the previous text you're just noting a change in the breaks of birds based off of the diet available to them at certain times. The adaptations and natural selection will explain the changes because due to certain limited and available foods the diet of the birds change.

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3 years ago
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The axial skeleton provides an extensive surface area for the attachment of muscles that __________.
garik1379 [7]

The question is incomplete as it does not have the options which are:

  • Adjusts the positions of the head, the neck, and the trunk
  • Perform respiratory movements
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Answer:

All of the above

Explanation:

The axial skeleton is the group of bones which forms the centre of the skeletal system. The central portion of the skeletal system includes bones of the skull, bones associated with the skull, the thorax, and the vertebral column (spinal cord).

There are 80 axial skeletal bones out of which 22 bones are present in the skull, 7 attached to the skull, 25 in a thoracic cage and 26 in the vertebral column.

The axial skeleton help maintains the position of the appendicular skeleton, maintain the posture of the body by maintaining the posture of the neck, head and trunk and also help in the respiratory movements.

Thus, all of the above is correct.

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3 years ago
Which of these describes a difference between rock and minerals?
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Answer:

the difference between rocks and minerals .A mineral is a naturally not occurring, inorganic solid with a definite chemical composition and a crystalline structure formed by geological processes. A rock is an aggregate of one or more minerals whereas a rock may also include organic remains and mineraloids.

Explanation:

3 0
4 years ago
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